He's saying that most or all religions must be inherently creationist. Off the top of my head, Hinduism isn't:
Neither being nor non-being was as yet. What was concealed? And where? And in whose protection? Who really knows? Who can declare it? Whence was it born, and whence came this creation? The devas were born later than this world's creation
, so who knows from where it came into existence? None can know from where creation has arisen
, and whether he has or has not produced it. He who surveys it in the highest heavens, he alone knows - or perhaps does not know. (Rig Veda 10:129)
In fact most Indo-European religions are non-creationist, conceiving of the gods as evolving after the universe.